Type-writing machine.



C. B. YAW'.

TYPE WRITING MACHINE.l

APPLICATION FILED AUGJ. I9I4.

Patented Aug.y 21, 1917.

3SHEETS-SHEET I- v IND i. im

IIISATTDRNEY C. YAW. TYPE WRITING MACHINE. APFLIGATION FILEDk AUGJ.1914.

A Patented Aug. 21, 1917.4

3 SHEETS-SHEET 2.

INVENTUR wlw-15555.52

HEATTDRNEY C. B; YAW.

TYPE wRmNG MACHINE.

APPLICATION FILED AUGJ. i914.

Patented Aug. 21, 1917 INVENT:

HIEATTDRNEY uNTED STATES PATENT oEEIcm` CLIO B. YAW, F ARLINGTON,JERSEY, ASSIGNOR TO REMINGTON TYPEWRITER COMPANY, OF ILION, NEW YORK, .ACORPORATION OF NEW YORK.

TYPE-WRITING MACHINE.

Appication led August 7, 1914. Serial No. 855,551.

To all 'whom t may concern:

Be it known'. that I, CLIO B. YAw, citizen of the United States, andresident of Arlington, in :the-county of Hudson and State of New Jersey,have invented certain new and useful Improvements in Type-Writing Machinos, of which vthe following is a specification.

, parts hereinafter described and My present invention relates tocarriagefeeding or escapement mechanism for typewriting machines and itsprincipal object 1s to provide 'new'and improved mechanism of thecharacter specified.

To the above and other ends my invention yconsists in the features ofconstruction, comliinations of devices and arrangements of particularlypointed out in the claims.

. ln the accompanying drawings which illustrate the preferred form of myinvention,

Figure l is a fragmentary vertical sectional view taken fore and aft ofa typewritingmacliine embodying my invention.

Fig. 2 is a sectional view taken on a plane passing through the axis ofthe carriage spring drum. 't

Fig. 3 is a face view taken from the front, of the escapement wheel andassociate parts including a section of the carriage rack.

Fig. 4 is a face view of a supporting frame and of the carriage motorand escapement wheel devices mounted thereon, the escapement wheel andassociate parts being shown in section.

Fig. 5 is a rear elevation showingthe dog rocker shaft and connectedparts.'

F'gs. G, 7, 8, -9, 10 and 11 are Aenlanged views showin@ the esca ementdo s and their supporting and controlling devices in vari-` ousrelatonships.-

As appears from Fig. 1 the mam frame of ythe machine comprises endplates 'l and a.

connectingtop plate 2. Detaehably mounted on the rear portion of the mamframe is a grooved track-way 3 which coiperates 'through anti-frictionballs 4 with the slidebar 5 of a-traveling'platen carriage 'whichfurther includes a pair of parallel arms 6 fixed to the bar 5 4near itsends and extending upward and forward therefrom.

As more fully disclosed inmv co-pending application ASerial No;137,014aled Decemberli, 1916, the trackway 3 is .provided tions 3b thatare adapted to detachably engage with pins la projecting laterallyoutward fronrthe-sides of the frame 1. The construction enables thetrackway 3 and the carriage which it supports to be readily removed andreplaced, this being so whatever position in its travel along thetrackway the carriage may have reached orv may occupy.

Fixed to the arms 6 are supplementary arms or platen frame pieces 7which provide bearings for the shaft 8 of the rotary platen 9.Coperative with the front face of the platen are a series of ballbearing type bars 10 having a stationary fulcrum 11 and each connectedthrough a link 12 With a lever 13 fulcrumed at 14 on a stationarysupport 15, the. tail 13'-L of each lever being connected to a restoringspring 16. A vlink 17 connects each lever 13 with one arm of a bellcrank 18, the other armv whereof is'connected to an upright key stem 19provided with a key or button 20, said key stem bearing in a plate 21fixed to the main frame. In addition to the printing keys 20 there isprovided a space key or' bar 22, from the middle portion whereof dependsa stem `or arm l23 which is controlledrand guided by a spring pressedlever frame 24. Said -stem is connected at its lower end to a crank arm25 projecting laterally from a rock shaft 26 extending fore and aft ofthe machine and provided near its rear end with an oppositely projectingcrank arm 27 overiying which is the forward or freeA end of a crankframe 31 which is vertically arranged in rear of the type bars and isoperative by the tails' 13 of the levels 13. Said universal bar frame issupported and guided by crank arms 32 which rise from a rock shaft 33near the ends thereof, said rock shaft bearing in the sides of the baseabove the dog rocker. shaft, the lfree ends of said crank arms 32 beingpi otally connected to lugs or projeetions 34v xed to the frame 31. Theconnections proper between the universal bar frame and the dogrockershnft comprise a crank arm 35 fixed about centrally to the dog`rocker shaft and projecting upward frtherefrom, a lateral pin '36 nearthe upper end Specification of Letters Patent. Patented Aug. 21, 1917. i

- unison by connections comprising crank arms 38 and 39 fixedrespectively to said shafts near their left-hand ends and connected by avertical link l0. A restoring spring ll is connected at one end to acrank arm 42 fixed to the rock shaft 33 at its right-hand end, the otherend of said spring being connected to a crank arm 43 fixed to the shaft2f) near its right-hand end. The construction is such that when one ofthe printing keys is operated motion will be transmitted to theuniversal bar frame 3l through the tail 13a and from said universal barthrough the described) connections to the dog rocker shaft 29. Also whenthe space key is actuated it will rock the shaft 26, causing the crankarm 2T to actuate the crank arm 28 and rock the shaft E29, to which saidcrank arm 28 is fixed. The printing instrumentalities, space bar anduniversal bar construction heretofore described are like the'corresponding parts found in the No. 1,0 Smith Premier machine and arenot claimed specially by me.

The lettward step-by-step movements of the carriage to space betweenletters andv words are caused and controlled by motor or spring drum andescapement mechanisms which are mounted on a detachable frame best shownin Fig. 4 where it is indicated as a whole by the reference numeral 44.Said frame is composed preferably of a single fdate or sheet ot metalwhich is cut out as shown both for the sake of lightness and toaccommodate various devices including those which it supports. The frameor plate 44- is arranged at the rear and lower part of the machinebehind the type bar system and inclines upward and forward, beingsecured at its ends by screws l5 to lugs 46 on the end plates 1. Thereare four of these screws 45 and by removing them the frame -l-l,together with the motor and escapement'l mechanisms, may be readily andexpeditiously removed from the machine. Headed screws 4T which passfreely through slots 4S in the plate Jet adjustably secure a U- shapedcross bar or bracket 49 to said plate at its left-hand end portion. saidbar bridging an opening 44a in said plate and provining a support for acasing or stationary drum 50 which houses` as best shown in Fig. Q, acoiled spring 51, the outer end whereof is anchored to the casing 50.Fixed to and and projecting rearward and upward from the central portionof the bracket 49 is a pin or stationary shaft which provides a bearingfor the hub 53" of a `gear wheel 5?. As shown herein the gear wheel ismade as a separate pieceV from its hub to which it is secured by screwthat lare threaded into a flange formed integrally with said hub. Theinner end ot' the spring 5l. is secured to said hub and the tendency ot'said spring is to turn the gear wheel in the direction of the arrow inFig. 4. Displacement of the gear wheel from its bearing or shaft isprevented by a headed screw 53" which 1s threaded into the end of theshaft Between the head of the screw and the outer face of the gear Wheelare arranged certain devices included in the back spacing mechanismwhich forms the subject-matter ot' my co-pending application, Serial No.854,429, filed August l, 1914 and need not be particularly describedherein. The gear wheel 53 may be employed as a tension adjuster and byturning it in the opposite direction from the arrow the tension of thecarriage spring 5l may be increased. This may only be done, however,when the platen carriage is removed. Normally the teeth 54 of said gearwheel mesh with rack teeth 55 formed at the lower rear side of a rackbar 56 that is suitably secured tothe lower end portion of the slide bar5 (Fig. l). Said rack bar inclines downward and rearward and its forwardside at right angles to the rack teeth 55 is formed with teeth 5Tproviding a rack for coperation with the cscapement devices`:sdiereinat'ter described. When the 95 platen carriage is removed andthe rack 55 is disconnected from the gear teeth or circular rack 54, thetendency of the main spring to run down is prevented by a detent orlocking device in the form of a pawl 10a 58 pivoted at 59 to the frame4st and provided with an angular tail piece or extension (i0 carrying ananti-friction roll (il which is adapted to-coperate with the under partof the slide bar 5 when the carriage is 105 in place at which time thepawl tooth is maintained inoperative out of the path of the gear teeth54. A spring (32 coiled around the pivot 59 tends constantly to pressthe pawl 5S into engagement with the teeth 5l 110 so that when thetrack-way 3 and the platen. carriage are detached, freeing the roll`(il, said spring operates to throw the pawlinto the gear wheel andautomatically lock the carriage motor, preventing it from running 115down. From this construction it will be .noted that the carriage may beremoved at any point in its travel and that the locking pawl becomesinstantly etlective whenever the carriage is removed. 0n replacing the120 carriage the under part of the slide bar 5 engaging the roll 26 willautomatically force the pawl tooth out of the gear wheel overcoming thespring 62.

The motor or spring 51 acting through the 125 gear and rack connection54, 55 tends constant-ly to urge the carriage lettward but lcttwardmovements are ordinarily controlled and regulated by escapcmeut devicesi next to be described. Arranged in an open- 130 formed between the bodyof the shaft anding 44 centrally of the plate '44 is a shaft 63 which atits upper end is reduced and bears in an opening in said frame, thelower end of said shaft being also reduced and bearing in an opening ina block 64- detach. ably secured .fb (Figs. 1 and 4?,

shaft, ,aid cross pin acting as a stop to limit upward movement of thepinion 65 lengthwise of the shaft. Downward movement of said pinion isprevented by a shoulder 63a the slightly reduced portion thereof onwhich said pinion bears. g Said pinion meshes normally with the rackteeth 57 and is adapted to transmit movement to the shaft 63 by means ofa clutch member 68 which is rotatably and slidably mounted on the shaftbelow the pinion 65 and -is provided 'at its upper end with ratchetteeth 69 which mesh with corresponding ratchet teeth 7 0 formed in theunder face of the pinion. Fingers71 projecting downward from the clutchmemer at opposite sides ofthe shaft slidably engage with notches orslots 72 out in a flange 73 on said shaft, the construction bei ing suchthat the clutch member is forced to turn always with the shaft. Keycontrolled devices (not shown) engage in a circumferential groove 74 inthe clutch member and are operative to move said clutch .mem-

ber downward on the shaft to disengage the ratchet teeth 69 from theratchet teeth 7 0 so as to permit the pinion 65 to turn freely on theshaft, thus releasing the carriage and permitting it to run freelyleftward under the pull of its motor. The downward or releasing movementof the clutch member is. limited by the 'fiange 73 which acts as a stop.Such downward'movement is in opposition to a spring 75 which is coiledaround the shaft 63 and coperates with the lower ends of the fingers 71,said spring operating to maintain the clutch member normally engagedwith the pinion andv also to restore said clutch member to engagementafter the releasing opera ion. The lowerend of said spring-abuts'aga'inst a hufb\member 76 secured by set /screws 77 in fixedrelationship with said shaft 63.

as by riveting an escapement wheel 79 provided with a series of long,radial teeth '80. To the lower ends of said hub member is fixed byscrews 81 a ratchet wheel 82 with which coperates a gravity paWl 83pivoted at 84 to a bracket 85 adjustabl secured by a screw 86 to theplate 44. T epawl-and ratchet 83 and 82 coperate topreuent backwardturning ofthe escapement'wheel.

Said hub member is `.provided with a flange 78 to which is securedCooperative with the teeth 80 of the escapement wheel are escapementdogs which are mounted on the' shaft 29 (Figs. 1 and 5-11). There aretwo of these dogs, numbered respectively 87 and 88 mounted side by sidewith their working faces transverse of'the plane of vthe escapementwheel, said dogs being arranged or housed in a depression or slot 89 ina dog rocker 90 and pivoted co-axially on a pivot pin 91 bridging saiddepression near the bottom thereof as best appears from'Fig, 10 which isan end View taken from the left-hand side, Fig. 9 being thecorresponding view from the right. The dog rocker is inclined rearwardand upward from the rock shaft 29 at an angle parallel with the plane ofthe escapem'ent wheel. Said dog rocker is Ain the'form of a block whichis detachably secured by set screws'92 to the'rock shaft 29. Coiledsprings 93 housed in depressions 94 in the dog rocker coperate one witheach dog and tend constantly to press their respective dogs normallyoutward or toward the left. Outward movementxof said dogs is limited bya T- shaped'stop 95 fixed to said dog rocker-,'the stem thereof passinginward between the dogs and the head comprising oppositely projectingstop portions proper. capement is a convertible one, and maybe madeordinary or reverse at -will by alter- The esnately making each dogeither `a fixed dog or a stepping dog. This result is accomtrolleddevices mounted on the rock shaft 29 and comprisin in an arm 97 fixed.by a screw 98 to the crank arm 39 and consequently rigid with saidyrock shaft. Said shaft 96 extends outward through a slot lL in theadjacent end plate 1 and is provided with a linger butto-n or key 99 bywhich it may be turned back and forth. The inner end portion of said rodor shaft passes between the two dogs 87 and 88 and bears in a hole inthe dog rocker, Athe end of said shaft projecting through said dogrocker and supporting a coiled spring 100 which is confined between thedog rocker and a cross pin 101 fixed to said shaft near its end. Thisspring constantly tends to draw the shaft 96 rightward. A. stop lug 102projects from a collar 103 suitably fixed to the rod ing the shaft saidstop 102 may be caused to plished in the present instance by hand cong arod pr shaft 96 bearing near lts outer en cooperate either with one dogor vthe other "so as to fix its relationship with respect toA Shoulders87a and 88a' the ldog rocker.

formed in the working facesof the dogs BEST AVAILABLE COF" Under allconditions the rear dog 87 is normally engaged with' the esoapementwheel. lVhen the adjustable stop 102 is turned forward `so that itcooperates with the dog 88 as in Fig. 6 the spring 93 of said dog isovercome and the dog is held rigidly on'the dog rocker during escapementoperations and acts as a fixed dog.- At this'time the dogl87 is free tobe moved outward or away froml the rocker by its spring 93 when releasedfrom the escapement wheel until arrested by-the rear portion of theT-stop 95 as shown in Fig. 6 from which the escapement wheel is omitted.This figure, it \vi1l`be-:understood shows in top plan the positions ofthe dogs when a key is depressed at Which time the dog 88 will beengaged with the escapement wheel. Upon the release of the depressed keythe dog rocker will swing back to normal position,

the dog 87 passing behind the engaged or active tooth of the escapementwheel, and When the rigid dog 8,8 has moved far enough `forward .to4release the engaged tooth the escapement `wheel will begin to turn andthe oncoming tooth thereof will engage with the dog 87, overcoming itsspring 93 and moving said dog hack until it is arrested by engaging withthe bottom of the depression 89, thus permittingthe escapement wheel toturn a distance corresponding to the distance between two of itsteethand effecting a letterspace movement of the carriage toward the left.

When it is desired to reverse the feed so as to causethe escapementmovement to take place during the depression of the printing keys,`.thenger button 99 is turned to effect a half revolution of the stop lug 102from the Fig. G position to the position shown in Figs. 5, 7 and 8.Duringthisturning movement the stop will swing downward and rearward,releasing the dogr 88 so that it will be under control of its spring93.` After releasing said dog the inner end of the stop 102 will engagewith a beveled or inclined portion 87b of the outer face of the .dog 87and will cam said dog inward, overcoming its spring 93 so that it willbecome the Xed dog and will be maintained in rigid relationship withthedog rocker during escape ment operations. `When such operations takeplacethe rigid dog 87 will swing rearward out of engagement with theescapement wheel and the stepping dog `88 will swing into the plane ofsaid eseapement wheel so that toward the end of the key depression theescapement wheel will turn to overcome the individual spring of said dog88 and cause a letter space advance movement of the carriage. Duringreturn movement of the dog rocker to normal position the loose orstepping dog 88 will `be freed so that it will be again moved outward byits spring until arrested by the forward i F ig. l1. The ends of thestop are preferably beveled to facilitate camming operations on the dogsand the beveled or pointed end fits loosely in the pocket, thisconstruction serving both to center the stop and to permit outwardpivotal movement of-both dogs until arrested by the stop as shown insaid Fig. 11. lVith the parts in this rela-4 tionship both dogs areloose and the escapement is set to permit a letter space movement on thedown stroke as well as one on the up stroke of the key, thus providingfor ya double space at each key stroke. This spaces the letters twice asfiar apart as usual, a style of printing which is sometimes favored forheadings, or to emphasize words or statements.

Various changes may be made without .departing from my invention.

Vhat I claim as new and desire to secure by Letters Patent, is

1 In a typewriting machine, the'combination of f removable travelingcarriage, a rack connected therewith, a motor, a gear wheel connectedwith said motor and -meshing with said rack, a pawl. means constantlytending to press said pawl into engagement with said gear wheel, saidmeans being normally maintained ineffective by said carriage but theremoval of the carriage at any point in its travel rendering said meanseffective, the mere replacement of tlie carriage automatically renderingsaid means ineffective again.

2. In a typewriting machine. the combination of a removable travelingcarriage,

'a rack connected therewith, a carriage motor, a gear wheel connectedwith said motor and meshing with said rack, a pawl `provided with atooth adapted to engage said gear wheel and having a portion constantlyengaged by said carriage thereby normally holding said tooth out ofengagement, and a spring'constantly tending to press said tooth into.engagement with said gear wheel, the removal of the carriage at anypoint in its t1 Lvel instantly rendering said spring eiective, the lmerereplacement of said earriage automatically rendering said pawlineffective a'gain.

3. In a typewriting machine, the combivided with' a nation of atraveling carriage, a carriage motor, separable rack and gearconnections between vsaid carriage and said motor, and means forautomatic-ally preventing said motor from running down when said rackand gear connections are separated, said means comprising a normallyinoperative pawl provided with a sprin which tends constantly to forcesaid paw into engagement with said gear connection but Awhich isnormally rendered ineffective by said carriage; said rack and gearconnections heing separable at any point in the carriage travel and saidspring becoming Jeffective the instant said separation takes place, themere replacement o -said carriage automatically rendering said pawlineffective again.y

4. n a typewriting. machine, the combination of -a carriage, a rackmember provided with two sets of teeth, said teeth be-v ing disposed atangles to each other, carriage motor devices comprising a gear wheelmeshing with one of said sets of teeth, and escapement devicescomprising an escapement Wheel and a feed pinion, said feed pinionmeshing with the other of said sets of teeth. v

5. In a typewriting machine, the combination of a carriage, a rackconnected therel Sotwith, a carrlage motor, a

ear wheel connected with said motor an meshing with 'said rack, and a.spring pressed' pawl normally maintained inoperative by said carriagebutadapted to engage with said geai, wheel to" prevent the same fromturning'j" in one drectionfand the motor from ruin-` ning down, saidpawlhowever permitting the gear Wheel to be turned in the oppositedirection to increase the motor tension.

6. In a typewriting machine, the combination of a carriage, anescapement wheel connected therewith, a pair of coperative dogs, a dogrocker, a dog rocker shaft, and v means supportedpartly on said dogrocker and partly on said shaft and operative on said dogs to convertthe escapement.

7. In a typewriting machine, the combination of a carriage, anescapement wheel connected therewith, a pair of eoperative dogs, a dogroker, a dog rocker shaft, and

dog convertingmeans comprising a yrod provided with" aipfinger pieceoutside of` the' machine andlia'v-ing a bearing fixed to sai'd shaftadastoppoperative by said rod and coperativegat lwill with' either ofsaid dogs.

8. ,In a typewriting' machine, the piombination Yof a carria e, an.esc'apement wheel connected therevvit ,a pair of coperative dogs, a dogrocker, wdogf rocker shaft, and.

. ger piece outside of the machine and having a bearing fixed to saidshaft and astop operative by said rod and coperative at will with eitherof dogs,

dog convertinnmeans comprising a rod prosaid stopbeing also settable tofree both dogs at the'same time.

9. vIn a typewriting machine, the combination of a carriage, anescapement wheel connected therewith, a pair of coperative springpressed dogs, a dog rocker, a dog rocker'shaft, and a rotary stop forlocking either. of saidfdogs against movement relative to said dgrocker, and a spring co erative with said stop for overcoming t e dogsprings.

10. In a' typewriting machine, the combination of ,a carriage, anescapement wheel, a pair of coperative dogs, individual springstherefor, a dog rocker supporting said dogs, a rotary hand controlledstop, and a spring cooperative with said stop and stronger than said dogsprings, said stopbeing settable to lock either of said dogs in fixedposition on said dog rocker.

11. In a typewriting machine, the combination of a carriage, anesca-pement wheel, a pair of cooperative dogs provided with oppositelybeveled side edges, springs therefor, a dog rocker supporting said dogs,a rotary hand controlled stop provided with beveled edges coperative.

with the beveled edges of the dogs to cam said dogs against theirsprings, and a spring coperative with said stop and stronger than saiddog springs, said stop being settable to lock either of said dogs infixed position on said dog rocker.

12. In a typewriting machine, the combination of a carriage, anescapementwheel, a pair of coperative dogs provided with oppositelybeveled vside edges, individual springs therefor, a` dog rockersupporting said dogs, a rotary hand controlled stop provided withbeveled edges coperative with thebeveled edges of the dogs to cam saiddogs against their springs, anda spring coperative with said stop andstronger than saidv dog springs,said stop being settable toy lock eitherof said dogs in {ixed position -on said dog rocker and also beingsettabletoL inindividual v operative position in the pocket formedybysaid beveled side-edges.

13. In a typewriting machine, the combination of a carriage, anescapement wheel connected therewith, a pairof coperative dogs,individual dog springs, a dog rocker,

a dog rocker shaft, a rod provided with a finger piece outside of themachine and havvto move it longitudinally in one direction,

said spring acting in opposition to the individual dog springs..

14. In a typewriting machine, the combination of ai carriage, anescapement wheel `'oilnected therewith, a pair of coperating Signed atthe borough of Manhattan, city Eloge', individual springs for Said dogs,a of New York, in the`county oNeW York, FJ qmovable dog supportingframe, a rod proand State of New York, this 6th day ot' vidednvith afinger piece und mounted on August, A. D. 1914.-.

5 said frame, a` stop on said rod coperative CLIO B. YAV.

at will with either of said dogs, and a spring 'VVitnesseS: for pressingsaid rod in oppositiQn to said E. M. WELLS,

dogg, springs. M. W. POOL.

